2 papers
math.NT2025
Hyperbolization of Affine Lie Algebras
Kaiwen Sun, Haowu Wang, Brandon Williams
In 1983, Feingold and Frenkel discovered a relation between Siegel modular forms of genus two and a rank-three hyperbolic Kac--Moody algebra extending the affine Lie algebra of typ…
math.NT2024
On the non-existence of singular Borcherds products
Haowu Wang, Brandon Williams
Let and be a modular form of weight on which vanishes only on rational quadratic divisors. We prove that has only simple zeros and that…